Light Quality and Intensity Modulate Cold Acclimation in Arabidopsis

0553152 - ÚEB 2022 RIV CH eng J - Journal Article
Přerostová, Sylva - Dobrev, Petre - Knirsch, Vojtěch - Jarošová, Jana - Gaudinová, Alena - Zupková, Barbara - Prášil, I.T. - Janda, T. - Brzobohatý, B. - Skalák, J. - Vaňková, Radomíra
Light Quality and Intensity Modulate Cold Acclimation in Arabidopsis.
International Journal of Molecular Sciences. Roč. 22, č. 5 (2021), č. článku 2736. E-ISSN 1422-0067
R&D Projects: GA ČR GA17-04607S; GA MŠMT(CZ) EF16_019/0000738
Institutional support: RVO:61389030
Keywords : Auxin * Combined stress * Cryptochrome * Cytokinin * Gene expression * Gibberellin * Phytochrome * Plant hormones
OECD category: Biochemistry and molecular biology
Impact factor: 6.208, year: 2021
Method of publishing: Open access
http://doi.org/10.3390/ijms22052736

Plant survival in temperate zones requires efficient cold acclimation, which is strongly affected by light and temperature signal crosstalk, which converge in modulation of hormonal re-sponses. Cold under low light conditions affected Arabidopsis responses predominantly in apices, possibly because energy supplies were too limited for requirements of these meristematic tissues, despite a relatively high steady-state quantum yield. Comparing cold responses at optimal light intensity and low light, we found activation of similar defence mechanisms—apart from CBF1–3 and CRF3–4 pathways, also transient stimulation of cytokinin type-A response regulators, ac-companied by fast transient increase of trans-zeatin in roots. Upregulated expression of components of strigolactone (and karrikin) signalling pathway indicated involvement of these phyto-hormones in cold responses. Impaired response of phyA, phyB, cry1 and cry2 mutants reflected participation of these photoreceptors in acquiring freezing tolerance (especially cryptochrome CRY1 at optimal light intensity and phytochrome PHYA at low light). Efficient cold acclimation at optimal light was associated with upregulation of trans-zeatin in leaves and roots, while at low light, cytokinin (except cis-zeatin) content remained diminished. Cold stresses induced elevation of jasmonic acid and salicylic acid (in roots). Low light at optimal conditions resulted in strong sup-pression of cytokinins, jasmonic and salicylic acid.
Permanent Link: http://hdl.handle.net/11104/0328155